Rob Kardashian took to Instagram Wednesday morning to post what he calls a "motivation time" picture.


Kardashian stepped out in May to debut his Arthur George sock line, and also his major weight loss. He credited his initial weight loss with a strict diet and two-a-day workouts.


On "Keeping Up With the Kardashians" last season, he said that he gained nearly 40 pounds while dating Rita Ora.


He also revealed his "little problem" as a result of weight gain: his supposedly shrinking penis. The upside? "Every time you lose 10 pounds you gain an inch on your penis."


Here's hoping some things are shrinking while others are growing.




Also on HuffPost:




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  • Kim Kardashian Attends 'QuickTrim' Photocall At Westfield London


    LONDON, UNITED KINGDOM - MAY 19: Kim Kardashian celebrates the launch of her weight management product 'QuickTrim' at Westfield on May 19, 2012 in London, England. (Photo by Stuart Wilson/Getty Images)




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  • DFI Red Carpet Arrivals for Cruel Summer - 65th Annual Cannes Film Festival


    CANNES, FRANCE - MAY 23: Kim Kardashian arrives at Cruel Summer , Kanye West's art film project with the Doha Film Institute which debuts May 23 at the Cannes Film Festival. (Photo by Andrew H. Walker/Getty Images for DFI)




  • Phoenix Suns v Dallas Mavericks


    DALLAS, TX - JANUARY 04: (L-R) Khloe and Kim Kardashian attend a game between the Phoenix Suns and the Dallas Mavericks at American Airlines Center on January 4, 2012 in Dallas, Texas. NOTE TO USER: User expressly acknowledges and agrees that, by downloading and/or using this Photograph, user is consenting to the terms and conditions of the Getty Images License Agreement. (Photo by Ronald Martinez/Getty Images)




  • Kris Jenner, mother of Kardashian celebr


    Kris Jenner, mother of Kardashian celebrity sisters Kim, Khloe and Kourtney, arrives at a red carpet event hosted by Google and the Hollywood Reporter, on the eve of the annual White House Correspondents' Association dinner in Washington on April 27, 2012. AFP PHOTO/Nicholas KAMM (Photo credit should read NICHOLAS KAMM/AFP/GettyImages)